Catheter

Abstract

Provided is a catheter that is manufacturable in a simplified fashion. The catheter 1 includes: a catheter tube 11 including a tip-flexible part 11A that has an inner tube (first tube 61) and a plurality of divided tube members 620 to 625 that are disposed on outer circumference of the inner tube and independent of each other; one or a plurality of metal rings disposed in the tip-flexible part 11A; one or a plurality of temperature sensors disposed corresponding to the one or the plurality of metal rings; and a handle 12 attached at a base end of the catheter tube 11. A rate of a thickness of the metal ring to an outer diameter of the metal ring is 7.5% or greater. The metal ring and the plurality of divided tube members 621 to 625 are both so disposed in the tip-flexible part 11A as to be fitted on an outer circumferential surface of the inner tube side by side in an axial direction of the catheter tube 11.

Description

TECHNICAL FIELD[0001]The invention relates to a catheter having a temperature sensor.BACKGROUND ART[0002]An operation that performs cauterization or “ablation” with use of an ablation catheter has been performed as one of medical treatments for arrhythmia, etc. Such ablation that uses the ablation catheter may be performed on a site that involves the arrhythmia inside the heart, for example. In general, methods of the ablation may be roughly classified into a method that performs heating and a method that performs cooling. More specifically, the methods of the ablation may be roughly classified into a high-temperature ablation that uses a high frequency current and a low-temperature ablation that uses liquid nitrous oxide, liquid nitrogen, etc. When performing the ablation of a site such as the posterior wall of the left atrium of the heart by means of the ablation catheter, i.e., upon surgical ablation of the left atrium, the esophagus located in the vicinity of the posterior wall ...

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